In fact I'll go as far as to say my car feels better than a stock maintained ZHP due to the fact Meyle control arm bushings are stiffer than the stock CABs spec'd for every E46 including the ZHP. Solid vs fluid filled.

I'll disagree there. I had both Meyle LCABs and OE LCABs on my ZHP... the latter felt better to me. Admittedly, I'm not sure if the Meyle's I had were the HD variant or not